Insulator.



' L. STEIN-BERGER.

INSULATOR.

APPLIOATION FILED sBPT.16,1907.

Patented July 6, 1909.

fifa/wey@ i 'onrrnn sTArr-ns LOUIS STElNBERGER, F NEW YORK, N.

rNsULAToR.

no. s273187,

To fill ilrliom it may concern."

lle it known that l, l'ioirs S'rnmnuaesn,

u rit izeu oi' the United itates, and a resident ol' the city oi'v KewYorin borough ol' Brooklyn, in the reunir of Kings and Str-.ie ot NewYork, here invented new and improved lnsuiator. oi' which [theiollowii'rt is o, full, clear, and exact description. v My inventionrelates to in'siployed in general electrical work' and .more parti'cularlyior service in high tci'ision work, and in instances wherethe insulator is subjected to `great .mechanical strain and highvoltage.

Arnone, the several objects oi' my invention are theiollcwing: l, toencircle the .metallic tension 'members with sevcralconcentric tubularmembers oi insulating material, thereby increasing the dielectricproperties of the insulator; 1l, to insulate certain internal parts oi'the structure with insulating material lia-vingV proporties adapting; itto resist mechanical stresses, and to cover the outer portions of thedevice with insulating material rendering it iireprcoi, waterproof, andotherwise suitable for out-door oztposure. Ill', toinereuse themocluinieel strength ot the insulator by providing it with disks havingbridges' integral rewitl'i and having shapes zuidrclative positulnsgiving" exeepl tion-al advent; regards mechanical ses; IV, to enable theinsulator to be esseinbl :d without the necessity for disconneeting thetension member. from anyl k which may engage them; to prmf'ulecertainparts of the insole-tingr n'iaterial with tubular portions integraltherewith. and eX- tending alongw the tension members for the purpose oiprotecting vpoints beyond the bounds of the particular body ofinsulating material with whichA they are integrally connected; Vl, toprovide the tension members with fastenings of an improved .kind whichvmay be placed iu'position after the tension members are placedapproximately in posi- -ition 5 VII, to sink the fastening members lastmentioned into the body portions of the device for the purpose/of morereadily holding` the fasteningl members in positionrVlIl, to Agive theexterior of the insulator such conformity totend more eiiectively toprevent arc'ing,Y and surface leakage, and also to adept the device forsupporting. wiresin various relations iX, -to providetensionmemberswith` fastening `members oit-such conformityas to enableone to'attach or remove Specification of Letters Patent.

Application filed September i6, 1907. Seriell. No. 393,088.

Patented July s, '1909.

them at will X,to provide tension disks havingr portions raisedrelatively to the surface upon which fastenings rest, so as to retainthe fastenings more securely iu place when the device is put understress. XI, to

provide a disk insulator of such construction that it may be connectedto other insulators either rigidly or ilexiblyl Reference is to be hadto the accompanying drawings forming a partof this specificolion, inwhich similar cl'iaracters oi reference indicate corresponding parts inall thefigures. Figure 1-` is 'a vertical, central section through an.insulator made in accordance with my invention and showing the relativepositions of the inner body of insulating materiel and the outer body ofinsulating material, the Vinner body of insulating material having'tubular portions extending` through it, this view also showing how thetension members are connected with. the -metallic disks and with theinsulating material of the insulator; Fig. 2 is a vertical cross sectiontaken upon the line 2-2 of Fig; 1 and sliowing more particularly the'arrangement of the `tension members and the insulating members; Fig. 3is a vertical section somewhat similarto Fig. 1 but showing theoutercovering of insulatingY .material us omitted, thedevice in thisfigure being capable of use, .if desired, without the addition oftheouter mem bei of insulating material shown in Fig. 1; Fig'. l is aperspective of one of ajpair ofnietallic` disks, for receiving themechanical stressdue tothel pull upon the device when in use, this'viewshowingT the various apertures necesselry for connecting thevariousparts properly in position; Figi.` 5 is e fragmentary perspectivesomewhat' similar to the topv of Fig.V 4 and showingl in addition aportion oi' one of the tension meinbers,'and the fastening member forpreventing` the withdrawal oi the tension member from the disk uponwhich it' exerts mechanical stress.

A pair vof metallic disksl are each provided with two circular'apertures 7 ofconsidereblesize and \vith",two smaller vapertures l8 1`alsol circular, the disk being further provided `with annular shoulders.9 disposed adjacent to the aperturesS.l In eHect, the eperturesS areholes provided with countersinks into which they merge. .'Eaeh disk 6 isprovided with a bridge 71 integral therewith, this f bridge simplyrepresenting the portion of material remaining between the epertures 7.Each disk 6 is further provided with thm portions 1() reiiresenting thematerial'lefti'be-A This bolt 13 extends through the lugs 12 and isprovided with a head 14 and with a revoluble nut 15 whereby it may beconnected to the wire, v.cable or analogous member to be used as asupport for theinsulator.

tension member 11/ is provided withA two prongs 16, each having va head17 integral therewith and' produced thereupon by upsetyting the' ends ofthe prongs. `l/Vashers 18 each having a slot 19, are made of a sizeenablingthem to be fitted against the sliouldeis 9 (see F ig. 5). Theslot 19 of each Washer 18 is preferably of such width that tlievwasliermust be driven forcibly upon the prong 16 in '20 order to gripittightly.

.v At 20, 20 are two disks of insulating material each flattened uponone side, these disks f being of a kind ad apted to 'resist compressionstresses. When the disks 20, 20a are `fitted together (sec Fig. 8) theyconstitute, to all intents and purposes, a single disk provided vwith acomparatively wide and thin edge.

Thentheparts are assembled, as. hereinafter described, yand asindica-ted in Fig. 3, lthey comprise practically a composite body ofinsulatingA material provided with holes 21 extending entirely throughit, and further provided with tubular extensions 22 and withY webs 23',these webs, one at each end of'tlie insulator, crossing each other.A-socket 24 is mounted integrally upon a tension ineinber 25, thellatter being divided into. two prongs 1G*L exactly like theprongs 16.vThe y socket 24 is provided with a hole 26 'extending diainetricallythrougli-it and is provided internally with a thread 27 for the purposeof engaging a threaded vbolt, or 'other member, in'A order to enable oneend of the insulator to be `suspended or otherwisel sustained, orconvnected with .any other member.

' -In order to' assemble the lparts shown in Fig. 3, the disks 20 and20, of insulating inaterial, are fitted respectively with the twometal-disks the latter being so disposed that the-walls 18 f one-of themare' substantially in registry with the aperture 7 of the other. tendcrosswi'se of eachother. The prongs of the tension nembersare nextinserted, the

heads 17 being passed through the'holes 21,

- 8 and the washers 18 being driven laterally uponthe prongs. The deviceis now ready for use if no further insulation than that' infA dicatedinFig. 3 Ais required. Itis desirable,

however, 'to providel further' insulation and also' to `prevent theentrancel of water into the parts shown in Fig. 3. In such event, 'I adda body 28. of insulating material, shaping ,it so as to form disks 29,and further provide it with ends 30 andwith annularccrruwith andconnected together bya bolt 13.`

The

In this manner the apertures 7EL ex` gat-ions 31, 32.' The disks 29 areseparated from each other by. an annular: groove'-33 which may be usedto advantage in receiving a wire 33a. -Tlie corrugations {Mp3-2,' areseparated by grooves 34, 35. The grooves 34, 35 may also be used toreceive one or more wires. '.lhe corrugations 31, 32, and the disks 29facilitate the dripping of mois ture and also avoid the tendency for thecuirent to leak. It for any reason it may be neces-sary to let theinsulator down to the` ground it has a tendency to remain upon the edgesof the disks 29 and thus to avoid the necessity. for the-wires, cablesorv guys coming into contactwith the earth.

The outerinember 28 of insulating material is preferably added after theother parts of the device are assembled, as shown in Fig. 3, and may beapplied by forcing the insulating materialfwhile in a plastic condition,into and around the parts shown in'Fig. 3. The material of the outerinsulating body is forced into the holes 21 and J8 so as to constitutetubular members extending pracf tically throughout the entire length oilthe inner body of'insulating material, including the tubular extensions22 of the saine. By this means each prong 16 is encircled by a sleeve 21of insulating material having one dielectric constant. These sleevesbeing encircled by a single body of insulating matciial having adiil'erent dielectric constant, and this "body being enveloped vin amass ot' insulating material having the samedielec- 4 tric -constant asthe sleeve 21, as will be un- 100 derstood from Fig. 2.4 The ends 30 ofthe outer bodyof insulating materialinay be about at ilush with` theinner edge of the socket 24 at one end of the strain and. may be causedto envelop a considerable part ot' 105 the tension member 11 at pointsextending considerably outward from the center of the f insulator.

It will be noted from. the above description that I have ijiroduced aninsulator vaffording considerable mechanical strength in proportion tothe sizes and quantities of material used', and also affording highdielectric qualities. Theeliiciency' of the insulator may be increasedby' building one part of itwith a 115 View to standing great mechanicalstresses .coupled with` considerable dielectric strains,

and vyet constructing another portion of the insulator of insulationadapted to render the construction waterproof and fireproot. Any numbero f these insulators may be connectedtogether or connected to insulatorsof different`form-inseriesso as te increase the aggregate insulation.The insulators may bear- .ranged with' their axes either horizontal or125 vertical.

' I do not-limit myself to the exact form, nor tothe details of any orall of the parts above shown and described, nor do I limit myself to anyparticular combination of the parts,

nor to the use of any prescribed materials, but prefer to use for theouter body portion shown in Fig. l the material well known in this artas "electrose", For the inner insulating portion shown in `Fig. 3 .l mayemploy either electrose ol' a more distinctive waterproof and lireprool'material, or any other suitable material.

It will he evident to those skilled .in the art that many changes in theconstruction, form and arrangement of the parts may be. resorted towithout (.lepai'ting l'rom the spirit or scope ol' my invention.

Having t-hus described my invention, l claim as new and desire to secure.by bett-ers Patent i Y 1. An insulator, comprising a plurality of disksof insulating material provided with holes', tension members providedwith prongs for extending through said holes, and l'urtlier providedwith 4heads,'and fastening members for. engaging said pi'oiigs and thuspi'cventing the retrogression of said heads tln'ough said holes.

2. An insulator, comprising a plurality of metallic disks, a body ofinsulating material engaging said disks and preventing electricalcommunication therebetween, said body of insulating material beingprovided with holes, tension members extending through said holes andprovided with heads, and washers provided with slots and disposedadjacent to said heads for preventing` retiogression of the latterthrough said holes.

3. An insulator, comprising a' body, ten sion members of conductingmaterial, and an outer covering of insulating material providedV with abody portion having annular corrugations encircling it, and also havingdisks integral ,with it, said disks being disposed in close. proximityto each other'aud Vmerging together at one point.

4. An insulator, comprising a body 4por- Vtion olinsulating materialprovided with holes, tension members provided with prongs extendingthrough 'said holes, and further provided with enlarged portions uponthe -ends of said prongs, said enlarged portions being of such size asto enable them to pass through said holes, and fastening members forpreventing the retrogression of said. heads through said holes.

5. An insulator, comprising a body poi'- tion of insulating materialprovided with tubular extensions of insulating material projectingoutwardlyT from the'ends of said bpdy portion, said body portion beingfurther provided with webs connecting together certain o f said tubularextensions, and tension meinbers extending entirely through said bodyportion of insulating material and through said tubular extensions, saidtension inembers being further provided with means for preventingtheirwithdrawal from said body portion.

6, An insulatoi', comprising a pair olt disks of insulating material,each provided with tubular'extensions mounted l'.lier;,upon and rigidrelatively thereto, the tubular.extew sions of one-disk being staggeredrelativelj.' to those of' another, and a pluralityfof metallic members[-)rovided with portions exteiid.

vmaterial extending integrally iiito said holes and disposedintermediate said metallic members and said disks. y

S. An insulator, comprising a body of insulating material provided withtubular extensions integral therewith, and further provided with holesextending through said body. and through said tubular extensions,tension members exteiuling through said holes and tubular extensions,and means for preventing the withdrawal ol2 said tension members fromsaid body ol insulating material.

9. in insulator, comprising a plural'ty ol" disks of metal each providedwith. apertures and with a bridge bounding said apertures, the bridge ofone disk being disposed across the bridge of another disk, each diskbeing provided. with holes disposed adjacent to the ends of the bridgeof that disk, a body ol' in sulating material disposed intermediatesai-l disks, and tension members extending tliroi A said holes in saiddisks of metal and through said body of insulating material.

10. An insulator, comprising a mainv body of insulating materialprovided with a disk and with extensions integral therewith, and furtherprovided wit'ii holes extending through. said main body and con tinnodthrough said extensions, tension nifnnbers following said holes and thusextending through said main body ol' insulating maie-v i including alio-dy o1e insulating material eX- tending outwardly and formed into aoompaiatively large disk.

13. An insulator, comprising a body of in sulating-material providedwith ay plurality of disks comparatively large in diameter merging.together and made integrale-'ith said body of insulating material, andstrain members connected with said body ylnortion.'

` 14. Aninsuletor, Comprising' a urality of disks of insulatingmaterial, 'said disks beng of comparatively large diameter anddisposedclosely together for thepurpose ol en-` gagmg opposite portionsot a conductor d1s` tension members 'with said disks for the purpose ofsupporting the latter.

16. An insulator, comprising a plurality'.

of disks each made of insulating material and provided with holes, saidholes being spaced a little distance from the outer edges of' the diskso as toleave a portion ofinsulating material intermediate said holesVand one edge of' said disk at the p ointsthereof nearest to saidedges,and tension members extending through said holesand insulated fromeaoli other.

In testimony whereof I have signed my nameto this specification in thepresence of two subscribing witnesses.

LOUIS STEINBERGER.

Witnesses z WALTON HARRISON, EVERAR'D lB. MARSHALL.

